package org.example.threading;

import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 线程池配置
 *
 * @author: Troy.Chen(無心道, 15388152619)
 * @version: 2023-11-24 11:45
 */
@Slf4j
@EnableAsync
@Configuration
public class TaskExecutePool implements AsyncConfigurer {

    @Resource private TaskThreadPoolConfig config;

    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 核心线程池大小
        executor.setCorePoolSize(config.getCorePoolSize());
        // 最大线程数
        executor.setMaxPoolSize(config.getMaxPoolSize());
        // 队列容量
        executor.setQueueCapacity(config.getQueueCapacity());
        // 活跃时间
        executor.setKeepAliveSeconds(config.getKeepAliveSeconds());
        // 线程名字前缀
        executor.setThreadNamePrefix("MyExecutor-");

        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

    /**
     * 异步任务中异常处理
     *
     * @return
     */
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new AsyncUncaughtExceptionHandler() {

            @Override
            public void handleUncaughtException(Throwable arg0, Method arg1, Object... arg2) {
                log.error("==========================" + arg0.getMessage() + "=======================", arg0);
                log.error("exception method:" + arg1.getName());
            }
        };
    }


}
